The momentum of the 500 pound polar bear sliding down an icy hill at 4 m / s is 907.2 N s
p = m v
p = Momentum
m = Mass
v = Velocity
m = 500 pounds = 226.8 kg
v = 4 m / s
p = 226.8 * 4
p = 907.2 N s
Momentum is simply defined as a mass in motion. A moving object that has mass will have momentum.
Therefore, the momentum of the 500 pound polar bear sliding down an icy hill at 4 m / s is 907.2 N s
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before going in for an annual physical, a 70.0-kg person whose body temperature is 37.0∘c consumes an entire 0.355-liter can of a soft drink (which is mostly water) at 12.0∘c.
The equilibrium temperature is required and to find whether the temperature change can be measured by a thermometer is required. The temperature is 310 K.
What is temperature ?A physical measure that describes how hot a substance or radiation is is called temperature.
There are three different types of temperature scales: those, like the SI scale, that are defined in terms of the average translational kinetic energy per freely moving microscopic particle, like an atom, molecule, or electron, in a body; those that only rely on strictly macroscopic properties and thermodynamic principles, like Kelvin's original definition; and those that are defined by practical empirical properties of particulates rather than by theoretical principles.
With a thermometer, temperature is measured. It is calibrated in a number of temperature scales that historically defined themselves using different reference points and thermometric substances. The Celsius scale, originally known as "centigrade," is the most popular scale.
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What did gravity create when 99% of the gas and dust materials were gathered into the center of a flattened disc during the formation of the solar system?.
gravity created a solar nebula when 99% of the gas and dust materials were gathered into the center of a flattened disc during the formation of the solar system
The explosion of a flattened disc created waves in space that compressed the cloud of gas and dust. The cloud is all gravitationally bounded together.
As the cloud continued to fall inward, the center eventually became so hot that it became a star, the Sun, and blew away most of the new solar system's gas and dust with a powerful stellar wind.
This squeeze caused the cloud to begin collapsing as gravity pulled the gas and dust together to form the solar nebula.
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suppose you need to design a parachute system to help a remote camera land safely at the bottom of a cave. the camera will drop from a height of one story. it has a mass of about 500 g. a carton of eggs inside a box will model the camera. for your test to be successful, none of the eggs can break when the box lands. you may use string, plastic bags, paper, and any fabrics you have to make a model parachute.
The answer is hang glider.
What is the model?In high school, I created a project for a similar experiment that was accepted.
It matters what you carry the egg in because it is an egg, so something cushioned.
Use the fabric and cut the paper bag to make the kind of parachute I mentioned before.
When people go sky divining, they use a specific kind of parachute because the design is supposed to slow the fall and give them a chance to make a safe landing.
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James defines a circle as "the set of all the points equidistant from a given point." His statement is not precise enough because he should specify that
(b) the set of points is in a plane
A circle has points in a plane, a center, a radius, and a diameter. Depending on the situation, at least one of the following words must be included in the definition of a circle:
Points in a planeRadiusCenterDiameterBased on James' definition of a circle, he needed to specify that the points are in a plane (option b).
The phrase "the set of all the points," as he defines it, has a variety of meanings. among them are:
the set of points on a line.
a plane's set of points.
the region's collection of points
James should have made it clear that the collection of points is in a plane.
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The complete question is mentioned below:
James defines a circle as "the set of all the points equidistant from a given point." His statement is not precise enough
because he should specify that
(a) a circle includes its diameter
(b) the set of points is in a plane
(c) a circle includes its radius
(d) the set of points are collinear
an electrician needs to install a surface-mounted, nonmetallic, weatherproof cabinet on the outside of a concrete block building. since the cabinet must be mounted in a wet location, it must be mounted so there is at least in. of airspace between the cabinet and the wall.
Since the cabinet must be mounted in a wet location, it must be mounted so there is at least 1/4 of airspace between the cabinet and the wall.
What is airspace?The area of the atmosphere that is under the authority of a nation above its territory, including its territorial waters, or, more broadly, any particular three-dimensional area of the atmosphere
It is not the same as aerospace, the umbrella term for the Earth's atmosphere and the proximity of outer space.
Wherever it is deemed necessary for air traffic control to exercise any sort of direct executive oversight over aircraft operating there, that area of the sky is known as controlled airspace.
A range of areas and zones, including those where flying operations are either completely prohibited or subject to restrictions, may be included in the further division of airspace.
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You walk in a given direction for 20 m during the first 5 seconds of a trip and then 15 m during the next 2 seconds. your average speed is equal to :________
You walk in a given direction for 20 m during the first 5 seconds, your average speed is equal to 5m/s
How can I figure out average speed?Average speed is determined by dividing the total distance you travelled by the total time, whereas average velocity is determined by dividing your displacement (a vector pointing from your initial position to your end position) by the whole time.
What is the rate of an object’s motion?The amount of something that happens or changes in a unit of time is expressed as a rate.
The equation for speed is that Divide the distance an object travels by the time it takes to cover that distance to determine its speed. A unit of distance is divided by a unit of time in the speed equation.
CalculationThen Average speed = total distance / total time
= 20 + 15 / 5 + 2
= 35/7
= 5 m/s
The average speed is calculated as 5m/s
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protein electrophoresis uses electric field to separate charged blood protein in a gel. this helps diagnoses various diseases, e.g. cancer. a protein typically has 23 excess electrons. the needed force to separate a protein is 10-14 n. the required electric field in the equipment is n/c.
The required electric field in the equipment is 35.77 * [tex]10^{17}[/tex] N/C.
We know that,
E = F / q
where,
E = Electric field
F = Electric force
q = Charge of electron
Given that,
F = 10e - 14 N = 13.18 N
No. of electrons = 23
q = 23 * 1.602 * [tex]10^{-19}[/tex] = 36.846 * [tex]10^{-19}[/tex] C
E = 13.18 / 36.846 * [tex]10^{-19}[/tex] = 35.77 * [tex]10^{17}[/tex] N / C
Protein electrophoresis is a test used to measure specific proteins in blood. The separation of proteins is based on their electric charge.
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Which of the following is not a pure form of a substance? a. Element b. Atom c. Molecule d. Mixture e. Compound
You throw a stone horizontally at a speed of 5.0 m/s from the top of a cliff that is 78.4 m high.
a. How long does it take the stone to reach the bottom of the cliff?
b. How far from the base of the cliff does the stone hit the ground?
c. What are the horizontal and vertical components of the stone’s velocity just before it hits the ground?
a)You throw a stone horizontally at a speed of 5.0 m/s from the top of a cliff that is 78.4 m high.
from above statement we got
height = 78.4 m
since the ball is thrown, so its vertical velocity would be zero
u = 0
taking g = 9.8m/s^2
now, using the equation of motion
h = ut + gt^2/2
now putting all the values in it
we got ,
78.4 = 9.8 * t^2/ 2
by solving we got,
t = 4 sec
b) now, since along the horizontal , no force acting and accelaration is zero so
R = ut , R is RANGE
R = 5 * 4
range = 20 m
c) vertical components of the stone’s velocity just before it hits the ground = v sin θ =
horizontal components of the stone’s velocity just before it hits the ground = v cos θ
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Help me please for Number 1
The mass of the object is obtained as 130 g.
What is the tripe beam balance?The triple beam balance is the kind of balance that could be used to measure the mass of a substance. There are so many kinds of balance that could be used in science and these include;
1) beam balance
2) Spring balance
3) unequal arm balance
We read the mass of the object by looking at all the points that we have set on the triple beam balance to achieve the balance point. In the case of the substances that we have seen in the image of the question, the mass of the object is obtained as 130 g.
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Calculate the number of atoms of zinc, zn, if you begin with 8.35 moles of zinc.
Taking into account the definition of Avogadro's Number, 5.029×10²⁴ atoms of zinc are in 8.35 moles.
Definition of Avogadro's NumberAvogadro's Number or Avogadro's Constant is called the number of particles that make up a substance (usually atoms or molecules) and that can be found in the amount of one mole of said substance. Its value is 6.023×10²³ particles per mole. Avogadro's number applies to any substance.
Number of atoms of zincThen you can apply the following rule of three: If 1 mole of zinc contains 6.023×10²³ atoms, 8.35 moles of zinc contains how many atoms?
amount of atoms of zinc= (6.023×10²³ atoms× 8.35 moles)÷ 1 mole
amount of atoms of zinc= 5.029×10²⁴ atoms
Finally, 5.029×10²⁴ atoms of zinc are in 8.35 moles.
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At dusk, a man in a park is using binoculars big enough that they are being supported on a tripod. Based on this knowledge, what can be
Inferred about these binoculars?
OA. They have a small field of view.
OB. They use lithium Ion batteries.
OC. They have a lower than normal magnifying power.
OD. They were purchased using a research grant.
They have a lower-than-normal magnifying power. is the correct answer.
Whatever your objective, a binocular tripod enables you to focus and stay there regardless of the wind or other environmental circumstances. You can see various regions simultaneously by using a tripod to hold several lenses in focus at once. Work your way down from the top of your head to get the appropriate tripod height. About four to five inches separate your eyes from the top of your head. The tripod head is roughly 4 to 4.5 inches high, and the telescopic eyepiece is about 4 inches above the bottom of the mount plate.
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One way to control avalanches is to send explosive charges to key areas on mountain slopes to trigger small avalanches before larger ones can build up. Norway, for instance, uses solar- powered launchers that fire pre-timed charges. Your launcher fires charges at an angle of 70 degrees from the horizontal and a speed of 200 m/s. If you fire a charge and it travels a horizontal distance of 300 m away from you, how high up the slope will it strike?.
By using uniform motion, the high up the slope will it strike is 730.62 m.
We need to know about uniform motion to solve this problem. The uniform motion is an object's motion under acceleration. It should follow the rule
vt = vo + a . t
vt² = vo² + 2a . s
s = vo . t + 1/2 . a . t²
where vt is final velocity, vo is initial velocity, a is acceleration, t is time and s is displacement.
From the question above, we know that
θ = 70⁰
vi = 200 m/s
x = 300 m
Find the initial velocity in x and y axis
vx = vi cosθ = 68.40 m/s
vy = vi sinθ = 187.94 m/s
Find the time taken to reach 300 m
vx = x / t
68.4 = 300 / t
t = 4.39 second
Find the time taken to reach maximum height
vt = vo + a . t
0 = vy - g . t
vy = gt
187.94 = 9.8 . t
t = 19.18 second
The motion of projectile is raising to maximum height, hence
s = vo . t + 1/2 . a . t²
h = vy . t - 1/2 . g . t²
h = 187.94 . 4.39 - 1/2 . 9.8 . 4.39²
h = 730.62 m
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a 1.0m1.0m by 2.0m2.0m by 3.0m3.0m rectangular block has a uniform density of 600kg/m3600kg/m3and is completely submerged and held stationary in a deep pool of water. the water exerts an upward buoyant force on the block of 6×104n6×104n . the block is released and, after rising a short distance toward the surface, experiences a drag force of 2×104n2×104n. the magnitude of the acceleration of the block at this instant is most nearly
The magnitude of the acceleration of the block at this instant is 1.11m/s².
Given here the dimension of the block 1×2×3m, so the volume = l×b×h =6m3 and density = 600kg/m³
Mass of the block can be calculated as, m= volume × density = 600×6=3600kg.
Now, we calculate magnitude of force which is given by,
∑Force = F buoyant – ∑F drag- ∑F gravity
Force = 6×104 -2×104 – 3600× 9.8 =3600 ×a
On calculating this, we get
a= 1.11m/s².
Thus, the magnitude of acceleration is found to be 1.11m/s².
Buoyant force, is an upward force applied by a fluid against the weight of an object that is partially or completely submerged. The weight of the fluid on top causes pressure in a fluid column to rise with depth. If the buoyant force acting on an object is greater than the gravitational force then object will float, if gravitational force is greater than buoyant force then object will sink or drown.
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By deflecting cathode rays with a magnetic field thomson was able to measure what property of electrons?.
The negatively charged electric plate is avoided in favor of the positively charged electric plate by the cathode ray. Thomson was able to estimate the mass-to-charge ratio of the particles by measuring the degree to which the ray was refracted by a magnetic field.
What property of the electron did Thomson measure?
J.J. Thomson measured the electron's mass in terms of its physical characteristics.Similar experiments were conducted with cathode rays and magnets by William Crookes, who came to the conclusion that cathode rays were made up of negatively charged molecules based on his observations of the rays' deflection by magnetic fields.J.J. Thomson used a Crookes, or cathode ray, tube to conduct experiments that discovered the electron in 1897. He provided evidence that cathode rays have a negative charge.The negatively charged electric plate is avoided in favor of the positively charged electric plate by the cathode ray. Thomson was able to estimate the mass-to-charge ratio of the particles by measuring the degree to which the ray was refracted by a magnetic field.
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If the speed doubles, by what factor must the period change if is to remain unchanged?
You have to double the period as well in order to keep it unchanged.
Concept of speedSpeed is calculated as follows: speed = distance * time. Knowing the units for distance and time is necessary to calculate the units for speed.
The units will be in metres per second (m/s) in this example since the distance is measured in metres (m) and the time is measured in seconds (s).
What is the formula for speed?The formula for speed is as straightforward as dividing a distance by a time.
To calculate speed, divide the distance travelled (say, 3 metres) by the passing time (say, 3 seconds) (one metre per second).
So, the rate at which an object’s position changes in any direction can be defined as speed.
The speed formula is as follows: [Speed = Distance]
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1. A vehicle leaves Leeds at 8.00am and
arrives in Newcastle at 10.30am. If the
distance is 140 km, what was the average
speed of the vehicle?
The average speed with which the vehicle travels is equal to 56 Km/hr.
Velocity is measured as a vector quantity. There is a magnitude to it as well as a direction. The magnitude of velocity is measured by speed. The S.I. unit for this is the meter per second. Additionally, there are other units like km/h and km/s. Its dimensional equation is [LT-1].
The average speed of any vehicle is calculated over a given range of time. It is the total distance traveled by the vehicle in the given interval of time divided by the given time interval. It is a scaler quantity.
Average speed= Total Distance/ Time Taken
Given in the question
Distance = 140 km
Time of leaving Leeds = 8.00 am
Time of arriving Newcastle = 10.30 am
Time Taken = Time of arriving Newcastle - Time of leaving Leeds
= 10.30 - 8.00
= 2 hours and 30 minutes
So, the time taken is = 2.5 hr
Put in the values, we get
Average speed= Total Distance/ Time Taken
Average speed= 140/ 2.5 Km/Hr
Average speed= 56 Km/Hr
So, the average speed with which the vehicle travels is equal to 56 Km/hr.
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two parallel conducting plates are separated by 10.0 cm, and one of them is taken to be at zero volts. (a) what is the electric field strength (in kv/m) between them, if the potential 5.50 cm from the zero volt plate (and 4.50 cm from the other) is 470 v?
Based on the problem, the distance between two parallel conducting plate is x=10cm=0.10mx=10cm=0.10m
The electric fielda)
The potential difference is V= 593VV= 593V
The distance between is d=7.05cm= 0.705md= 7.05cm= 0.705m
Recall the expression for the electric field.
E= VdE= Vd
Substitute the given values in above equation.
E= 5930.705= 841.13V/ mE =5930.705 = 841.13V/Vmm
Thus, the electric field strength is 841.13V/m.841.13V/Vmm.
b)
Recall the term for the voltage between the plate.
ΔV= E× x ΔV= E×x
Substitute the given values in above equation.
ΔV=841.13V/m×0.10m=84.11VΔV=841.13V/Vmm×0.10m=84.11V
Thus, the voltage within the plate is 84.11V.
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the resistance of two conductors of equal cross-sectional area and equal lengths are compared, and are found to be in the ratio 1:2. the resistivity of the materials from which they are constructed must therefore be in what ratio?
The resistivity of the materials must be constructed in ratio A₂ = 2A.
What is Resistivity?
The resistance of a wire can be defined as
R = ρL/A
Where,
ρ is Resistivity
L is Length of the conductor
A is Area of cross section of the conductor.
R₁/R₂ = (L₁/L₂) × (A₂/A₁) ----> rearranging it for A
A₂ = (R₁/R₂) × (L₂/L₁) × A₁
A₂ = (R/R) × (2L/L) × A
A₂ = 2A
Therefore, cross section area of another conductor must be 2A.
The strength with which a substance resists electric current is known as electrical resistivity, which is a fundamental attribute of materials. A substance that permits electric current to flow easily has a low resistance. The Greek letter is often used to symbolize resistivity. The ohm-meter is the SI unit used to measure electrical resistivity.
A substance's ability to resist the flow of current, or electrons, can be characterized as a physical attribute. A specific substance with specific dimensions is distinguished by its physical property of resistivity.
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a vector is 55.1 m long pointing in a 13.9 degree angle
The y-component of the vector is 13.24 m.
What is vector component?Vector components allow us to break a single vector quantity into two or more scalar quantities with which we have more mathematical experience.
The two component of a vector include;
y-component of the vectorx-component of the vectorWhat is x-component of a vector?The component of a vector that acts in horizontal direction is known as x-component of the vector.
What is y-component of a vector?The component of a vector that acts in vertical direction is known as y-component of the vector.
The y-component of the vector is calculated as follows;
Vy = V sinθ
Vy = 55.1 m x sin(13.9)
Vy = 13.24 m
Thus, the y-component of the vector is 13.24 m.
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The complete question is below:
a vector is 55.1 m long pointing in a 13.9 degree angle. Find the y-component of the vector.
a ball is initially rolling up a incline with velocity 0.2 m/s. during the motion is it decelerates uniformly at 0.05 m/s² a) at what time does the ball come to a stop? a ball is initially rolling up a incline with velocity 0.2 m/s. during the motion is it decelerates uniformly at 0.05 m/s² a) at what time does the ball come to a stop?
The ball will stop after 6 s.
The initial velocity of the ball is u.
u = 0.2 m/s
Acceleration of the ball is a.
a = 0.05 m/s²
The time interval is t.
t = 6 seconds.
The displacement of the ball at time t is s.
The displacement of the ball at time t is,
[tex]s= ut + \frac{1}{2} at ^{2} [/tex]
[tex]s= 0.2 \times 6+ \frac{1}{2} \times ( - 0.05) \times (6)^{2} [/tex]
[tex]s= 0.3 \: m[/tex]
Therefore, the displacement of the ball at time t is 0.3 meters.
The time at which the ball will stop is,
Distance = Speed × Time
0.3 = 0.05 × Time
Time = 6 seconds.
Therefore, the ball will stop after 6 s.
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Determine the limiting reactant and calculate the number of grams of al2o3 that can be formed when 10.0 grams of al and 5.00 grams of o2 react.
The 5.00 grams of oxygen gas (O₂) is the limiting reagent and the mass of aluminum oxide formed is 10.6 g.
What is limiting reactant?The limiting reagent is the reactant that is completely used up in a reaction, and thus determines when the reaction stop.
Reaction of oxygen and aluminum to form aluminum oxide3O₂ + 4Al → 2Al₂O₃
combining ratio of the elements;
O = 3
AL = 4
In the reaction above, 5.0 g of oxygen will be completely used, since it has the smaller combining ratio.
Mass of the aluminum oxide formed3O₂ ---------------> 2Al₂O₃
3(16 x 2) ------> 2(27 x 2 + 16 x 3)
96 ------------------> 204
5 -------------------> ?
= (5 x 204)/96
= 10.6 g
Thus, the 5.00 grams of oxygen gas (O₂) is the limiting reagent and the mass of aluminum oxide formed is 10.6 g.
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Which is true of photosynthesis and cellular respiration
Im confused on your questions, however they both need each other to work :D
Answer:
Photosynthesis and cellular respiration are processes by which plants and animals use to create energy from food.
Photosynthesis is exclusive to plants only though. It starts with sunlight which goes through the Electron Transport Chains (ETC's) and then through a cycle known as the Calvin-Benson cycle to create glucose.
Cellular respiration (cell resp) takes the glucose made in photosynthesis (or in the case of humans, from our food) and takes it through the Krebs cycle (sometimes referred to as the Citric Acid cycle) to create Adenosine Triphosphate (ATP) which is used to give us energy.
Hope that helps.
Does the intitial velocity of an object have anything to do with its acceleration?
Answer: Initial velocity is independent of the slope of the graph; that is, the acceleration. An object thrown downward still accelerates after release at the same rate as an object that is dropped.
Explanation: hope this helps
No.
A stone has the SAME acceleration whether you throw it down, throw it up, throw it sideways, or just drop it.
YOU decide the stone's initial velocity, but it always has the same acceleration after it leaves your hand.
The disadvantages of _____ telescopes include chromatic aberration and longer size.
The disadvantages of refractive telescopes include chromatic aberration and longer size.
This was the telescope developed by Newton in 1668.It is the simplest type of telescope which has a tube with lenses on both ends. The light enters through the lens on the farther end of telescope. The light is refracted to a point near the lens on the near end. It is then then further magnified when seen through the lens on the eyepiece.
Even though it was more reliable, it was really heavy and had a larger aperture and longer body. Since high quality lenses were costly to make, cheaper lenses were used mostly. So there was chromatic aberration.
Therefore, the disadvantages of refractive telescopes include chromatic aberration and longer size.
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One way to control avalanches is to send explosive charges to key areas on mountain slopes to trigger small avalanches before larger ones can build up. Norway, for instance, uses solar- powered launchers that fire pre-timed charges. Your launcher fires charges at an angle of 70 degrees from the horizontal and a speed of 200 m/s. If you fire a charge and it travels a horizontal distance of 300 m away from you, how high up the slope will it strike?.
By using uniform motion, the high up the slope will it strike is 730.62 m.
We need to know about uniform motion to solve this problem. The uniform motion is an object's motion under acceleration. It should follow the rule
vt = vo + a . t
vt² = vo² + 2a . s
s = vo . t + 1/2 . a . t²
where vt is final velocity, vo is initial velocity, a is acceleration, t is time and s is displacement.
From the question above, we know that
θ = 70⁰
vi = 200 m/s
x = 300 m
Find the initial velocity in x and y axis
vx = vi cosθ = 68.40 m/s
vy = vi sinθ = 187.94 m/s
Find the time taken to reach 300 m
vx = x / t
68.4 = 300 / t
t = 4.39 second
Find the time taken to reach maximum height
vt = vo + a . t
0 = vy - g . t
vy = gt
187.94 = 9.8 . t
t = 19.18 second
The motion of projectile is raising to maximum height, hence
s = vo . t + 1/2 . a . t²
h = vy . t - 1/2 . g . t²
h = 187.94 . 4.39 - 1/2 . 9.8 . 4.39²
h = 730.62 m
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Kriti does a work of 450 joule using the power of 1500 watt. how much time is taken to do the work?
Answer:
450
Explanation:
I think answer is 450.
PLEASE HELP
Obtain expressions in component form for the position vectors having the following polar coordinates.
After conversion into cartesian coordinates, we can write the position vectors as -
a) → r = 12.4 m , θ = 170° ↔ - 12.21 i + 2.15 j
b) → r = 4 cm , θ = 50° ↔ 2.57 i + 3.06 j
c) → r = 20 inches , θ = 210° ↔ - 17.32 i - 10 j
What are cartesian coordinates?Cartesian coordinates are two-dimensional coordinates which are used to represent a point in X-Y plane. They are, in general, written in the form (x, y), such that x is the horizontal distance of point from origin and y is the vertical distance of point from origin.
Given are the position vectors in polar coordinates of three points in X-Y coordinate system.
It is important to remember the following relations, in order to transform from polar coordinates (r, θ) into cartesian coordinates (x, y) -
x = r cosθ
y = r sinθ
a) → r = 12.4 m , θ = 170°
x = 12.4 x cos (170°) = 12.4 x -0.98480775301 = -12 .21
y = 12.4 x sin (170°) = 12.4 x 0.17364817766 = 2.15
In cartesian form → ( -12.21 i + 2.15 j )
b) → r = 4 cm , θ = 50°
x = 4 x cos (50°) = 4 x 0.64278760968 = 2.57
y = 4 x sin (170°) = 4 x 0.76604444311 = 3.06
In cartesian form → ( 2.57 i + 3.06 j )
c) → r = 20 inches , θ = 210°
x = 20 x cos (210°) = 20 x -0.86602540378 = -17.32
y = 20 x sin (210°) = 20 x -0.5= -10
In cartesian form → ( -17.32 i - 10 j )
Therefore, in two - Dimensional cartesian system, we can write the position vectors as -
a) → r = 12.4 m , θ = 170° ↔ - 12.21 i + 2.15 j
b) → r = 4 cm , θ = 50° ↔ 2.57 i + 3.06 j
c) → r = 20 inches , θ = 210° ↔ - 17.32 i - 10 j
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For all of their diversity, many less developed countries are linked by a range of common problems. what are these problems? which do you think are the most important? why?
The major problem in a least developed country according to me is probably the low per capita income.
The problems that a less developed country faces are:
Crippling debt ( Due to low per capita income )High populationPoor infrastructureHigher usage of primary sectorA lot of these countries have poor infrastructure for other sectors than primary sector ( Eg. Agriculture, fishing etc. ). This results in exploitation of natural resources with less per capita income ( Amount of money earned per person in a region ). This leads to crippling debts, not just as a person, but as a whole nation.
Therefore, the major problem in a least developed country is probably the low per capita income.
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an antelope moving with constant acceleration covers the distance 80.0 m between two points in time 8.00 s. its speed as it passes the second point is 16.0 m/s.
Antelope's acceleration as it passes the second point is 1.65 m/s².
Speed: The ratio of distance to time can be used to quantify speed. M/s is the S.I. unit of speed.
Newton's equation of motion yields the following: S = (v+u)t/2.
u is the starting speed, v is the final speed, and S is the distance.
Given: v = 16.0 m/s, t = 7.10 s, S = 72 m.
making u the subject of the equation,
7.1(16+u) = 72×2
113.6+7.1u = 144
7.1u = 144-113.6
7.1u = 30.4
u = 30.4/7.1
u = 4.28 m/s
Thus the speed at the first point = 4.28 m/s .
The rate at which velocity changes is known as acceleration. M/s2 is the SI unit of acceleration.
a = (v-u)/t............................ Equation 2: acceleration is given by a.
v = 16.0 m/s, u = 4.28 m/s, and t = 7.10 s are given.
Replace in equation 2
a = (16-4.28)/7.1
a = 11.72/7.10
a = 1.65 m/s²
Thus the acceleration = 1.65 m/s².
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